The Internet is playing an important role not only in
information retrieving, but also in industrial processes
manipulation. This paper describes an approach to
writing requirements specification for Internet-based
control systems and to deriving architecture for this new
type of control systems according to the requirements
specification. Specification is described in terms of a
functional model and then extended into information
architecture. Distinct from the functional model, the
information architecture gives an indication to the
architecture of the Internet-based control systems. An
integrated-distributed architecture has been derived from
the functional model and the information architecture as a
case study.